diff --git a/themes/bootstrap3/templates/Auth/Database/recovery.phtml b/themes/bootstrap3/templates/Auth/Database/recovery.phtml
index 5ef8012a51797a865080339c18f098decfc8f5e9..b9f657abeca3920dbce9ed43d22523da73f56667 100644
--- a/themes/bootstrap3/templates/Auth/Database/recovery.phtml
+++ b/themes/bootstrap3/templates/Auth/Database/recovery.phtml
@@ -8,5 +8,5 @@
 </div>
 <?=$this->recaptcha()->html($this->useRecaptcha) ?>
 <div class="form-group">
-  <input class="btn btn-default" name="submit" type="submit" value="<?=$this->transEsc('Recover Account') ?>"/>
+  <input class="btn btn-primary" name="submit" type="submit" value="<?=$this->transEsc('Recover Account') ?>"/>
 </div>
diff --git a/themes/bootstrap3/templates/admin/tags/list.phtml b/themes/bootstrap3/templates/admin/tags/list.phtml
index d9b9419736d323e99bb94ae7ed64319a2afc098c..e651697a306efdc3a0a48f4269e4c2bf0c8305a5 100644
--- a/themes/bootstrap3/templates/admin/tags/list.phtml
+++ b/themes/bootstrap3/templates/admin/tags/list.phtml
@@ -94,7 +94,7 @@
 
           <input type="submit" name="deleteSelected" value="<?=$this->transEsc('delete_selected')?>" class="btn btn-default">
           <input type="submit" name="deletePage" value="<?=$this->transEsc('delete_page')?>" class="btn btn-default">
-          <input type="submit" name="deleteFilter" value="<?=$this->transEsc('delete_all')?>" class="btn btn-default">
+          <input type="submit" name="deleteFilter" value="<?=$this->transEsc('delete_all')?>" class="btn btn-danger">
 
         </form>
       </div>
diff --git a/themes/bootstrap3/templates/alphabrowse/home.phtml b/themes/bootstrap3/templates/alphabrowse/home.phtml
index 8ac31ec3b4daeb7bc678fb11d32133bd8b5a0cc0..f835972082287f7dfa0107b83311751bce137b95 100644
--- a/themes/bootstrap3/templates/alphabrowse/home.phtml
+++ b/themes/bootstrap3/templates/alphabrowse/home.phtml
@@ -31,7 +31,7 @@
   </select>
   <label for="alphaBrowseForm_from"><?=$this->transEsc('starting from') ?></label>
   <input type="text" name="from" id="alphaBrowseForm_from" value="<?=$this->escapeHtmlAttr($this->from) ?>" class="form-control"/>
-  <input class="btn btn-default" type="submit" value="<?=$this->transEsc('Browse') ?>"/>
+  <input class="btn btn-primary" type="submit" value="<?=$this->transEsc('Browse') ?>"/>
 </form>
 
 <? if ($this->result): ?>
diff --git a/themes/bootstrap3/templates/author/home.phtml b/themes/bootstrap3/templates/author/home.phtml
index b3c2f8279e888ea00da97edec28bce90cfcf1a3d..8f633380032565d703bcb04d832e841862a9b473 100644
--- a/themes/bootstrap3/templates/author/home.phtml
+++ b/themes/bootstrap3/templates/author/home.phtml
@@ -8,5 +8,5 @@
 <form class="form-inline" method="get" action="<?=$this->url('author-search')?>">
   <label for="author_lookfor"><?=$this->transEsc('Author Results for')?>:</label></br>
   <input class="form-control" type="text" id="author_lookfor" name="lookfor" />
-  <input class="btn btn-default" type="submit" value="<?=$this->transEsc('Find')?>" />
+  <input class="btn btn-primary" type="submit" value="<?=$this->transEsc('Find')?>" />
 </form>
diff --git a/themes/bootstrap3/templates/install/fixsecurity.phtml b/themes/bootstrap3/templates/install/fixsecurity.phtml
index 117ad5785cef7652c4fd3a68b648d40c218b886d..5d5042d401c9f53326c934bc18c166f2151369d2 100644
--- a/themes/bootstrap3/templates/install/fixsecurity.phtml
+++ b/themes/bootstrap3/templates/install/fixsecurity.phtml
@@ -19,7 +19,7 @@
   </p>
   <p><i>Do you still wish to proceed with enabling enhanced security in the database?</i></p>
   <form method="post" action="<?=$this->url('install-fixsecurity')?>">
-    <input type="submit" name="fix-user-table" value="Yes" class="btn btn-default"/>
+    <input type="submit" name="fix-user-table" value="Yes" class="btn btn-primary"/>
     <input type="submit" name="fix-user-table" value="No" class="btn btn-default"/>
   </form>
 <? else: ?>
diff --git a/themes/bootstrap3/templates/search/reservessearch.phtml b/themes/bootstrap3/templates/search/reservessearch.phtml
index ce2ee863da106f57ab0861247122614b3e52711d..d6219e06f30cb70b4b2759a13c3c9dc5bc213314 100644
--- a/themes/bootstrap3/templates/search/reservessearch.phtml
+++ b/themes/bootstrap3/templates/search/reservessearch.phtml
@@ -16,7 +16,7 @@
   <form class="form-inline" method="get" name="reservesSearchForm">
     <label for="reservesSearchForm_lookfor"><?=$this->transEsc("Your search terms")?></label>
     <input id="reservesSearchForm_lookfor" type="text" name="lookfor" size="40" value="<?=$this->escapeHtmlAttr($reservesLookfor)?>" <?=$this->searchOptions('SolrReserves')->autocompleteEnabled() ? ' class="autocomplete searcher:SolrReserves type:Reserves"' : ''?> />
-    <input class="btn btn-default" type="submit" name="submit" value="<?=$this->transEsc("Find")?>"/>
+    <input class="btn btn-primary" type="submit" name="submit" value="<?=$this->transEsc("Find")?>"/>
   </form>
   <script type="text/javascript">$("#reservesSearchForm_lookfor").focus()</script>
 
diff --git a/themes/bootstrap3/templates/upgrade/getsourcedir.phtml b/themes/bootstrap3/templates/upgrade/getsourcedir.phtml
index 4ac38abb410e09868fe948ab20911aaebe822feb..c7f6b16d7e6f2d89f0e304db025a8754b7094f85 100644
--- a/themes/bootstrap3/templates/upgrade/getsourcedir.phtml
+++ b/themes/bootstrap3/templates/upgrade/getsourcedir.phtml
@@ -10,7 +10,7 @@
 <h3>Option 1: Upgrade from VuFind 1.x</h3>
 <p>Please enter the full path of the directory containing your previous version of VuFind (e.g. /usr/local/vufind):</p>
 <form class="form-inline" method="post" action="<?=$this->url('upgrade-getsourcedir')?>">
-  <input type="text" name="sourcedir" /> <input class="btn btn-default" type="submit" />
+  <input type="text" name="sourcedir" /> <input class="btn btn-primary" type="submit" />
 </form>
 <hr />
 <h3>Option 2: Upgrade from VuFind 2.x or newer</h3>
@@ -25,5 +25,5 @@
     <label for="skip-<?=$this->escapeHtmlAttr($key)?>">Skip <?=$this->escapeHtml($value); ?> Upgrade</label><br />
   <? endforeach; ?>
   </p>
-  <input class="btn btn-default" type="submit" />
+  <input class="btn btn-primary" type="submit" />
 </form>
diff --git a/themes/bootstrap3/templates/upgrade/showsql.phtml b/themes/bootstrap3/templates/upgrade/showsql.phtml
index e77c606e53ce7be3c7fe4f2bdc88757f7cacd491..094ce028020c7860a8f3aec671f10ec1c775d7f0 100644
--- a/themes/bootstrap3/templates/upgrade/showsql.phtml
+++ b/themes/bootstrap3/templates/upgrade/showsql.phtml
@@ -19,5 +19,5 @@
 <textarea class="pre" rows="20"><?=trim($this->sql) ?></textarea>
 
 <form method="post" action="<?=$this->url('upgrade-showsql')?>">
-  <input class="btn btn-default" type="submit" name="continue" value="Next" />
+  <input class="btn btn-primary" type="submit" name="continue" value="Next" />
 </form>